The taxonomic position of Asterodon, Asterostroma and Coltricia inferred from the septal pore cap ultrastructure

Müller, Wally H.; Stalpers, J. A.; Aelst, A.C. van; Jong, Margo D.M. de; Krift, T.P. van der; Boekhout, Teun

doi:10.1017/s0953756200002677

Cited by 17 publications

(8 citation statements)

References 17 publications

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“…have pore cap perforations similar in size to those observed in this study (Ellis et al 1972, Mü ller et al 1998. Some of these studies used chemical fixation (CF) while others employed FS.…”

Section: Discussionsupporting

confidence: 75%

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Septal pore apparatus and nuclear division of Auriscalpium vulgare

Celio

Padamsee²,

Dentinger

et al. 2007

Mycologia

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Ultrastructure of the septal pore apparatus and nuclear division of Auriscalpium vulgare (Russulales) was examined with freeze substitution and is presented for inclusion in the AFTOL Structural and Biochemical Database (http://aftol.umn.edu). Previously unreported septal characters for the Russulales (Agaricomycotina) were observed: Septa of the hymenophore had bell-shaped perforated septal pore caps that may extend along the septum and a zone of organelle exclusion surrounded the septal pore apparatus. Metaphase I of meiosis and metaphase of mitosis were similar. Globular spindle pole bodies with electron-opaque inclusions were set within polar fenestrae of the nuclear envelope. The nuclear envelope was mostly intact with occasional gaps. Fragments of endoplasmic reticulum were present near the spindle pole bodies but did not form a polar cap. Structural characters may distinguish one or more clades of the Agaricomycotina and provide additional signal in phylogenetic analyses.

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Section: Discussionsupporting

confidence: 75%

“…The transition between layered pore cap and unlayered ER occurs at the base of the septal swelling (Bracker and Butler 1964, Ellis et al 1972, Mü ller et al 1998. Pore caps of A. vulgare displayed internal layering that extended along the cross wall identical to that seen but undescribed in chemically fixed A. vulgare (Keller 1997).…”

Section: Discussionmentioning

confidence: 99%

Septal pore apparatus and nuclear division of Auriscalpium vulgare

Celio

Padamsee²,

Dentinger

et al. 2007

Mycologia

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“…SPC18 is then deposited in the SPCs until it is instantly released in case it is needed to plug the dolipore. The filaments between the inside of the SPC and the plugging material (38,39,41,53) may transport or guide SPC18 from the SPC to the orifice of the dolipore. During this transport, the SPC matrix may become more electron translucent at sites where filaments are attached at the inside of the SPC (36,38).…”

Section: Discussionmentioning

confidence: 99%

“…The septum is tapered toward the pore, like the septa in ascomycetous fungi, but lacks Woronin bodies and elaborate septal pore caps (SPCs) (3,48). The Agaricomycotina fungi, on the other hand, are characterized by septa that are flared toward the pore, forming a barrel-shaped structure, the dolipore, and are associated with SPCs (9,17,21,35,37,39). The endoplasmic reticulum (ER) is connected at the base of the SPC, thus suggesting that the SPC is a subdomain of the ER (9,18,36).…”

mentioning

confidence: 99%

Septal Pore Cap Protein SPC18, Isolated from the Basidiomycetous Fungus Rhizoctonia solani , Also Resides in Pore Plugs

et al. 2008

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The hyphae of filamentous fungi are compartmentalized by septa that have a central pore. The fungal septa and septum-associated structures play an important role in maintaining cellular and intrahyphal homeostasis. The dolipore septa in the higher Basidiomycota (i.e., Agaricomycotina) are associated with septal pore caps. Although the ultrastructure of the septal pore caps has been studied extensively, neither the biochemical composition nor the function of these organelles is known. Here, we report the identification of the glycoprotein SPC18 that was found in the septal pore cap-enriched fraction of the basidiomycetous fungus Rhizoctonia solani. Based on its N-terminal sequence, the SPC18 gene was isolated. SPC18 encodes a protein of 158 amino acid residues, which contains a hydrophobic signal peptide for targeting to the endoplasmic reticulum and has an N-glycosylation motif. Immunolocalization showed that SPC18 is present in the septal pore caps. Surprisingly, we also observed SPC18 being localized in some plugs. The data reported here strongly support the hypothesis that septal pore caps are derived from endoplasmic reticulum and are involved in dolipore plugging and, thus, contribute to hyphal homeostasis in basidiomycetous fungi.

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“…McLaughlin et al 1995;Celio et al 2006), and septa (e.g. Moore 1985Moore , 1997Khan and Kimbrough 1982;Oberwinkler and Bandoni 1982;Kimbrough 1994;Wells 1994;McLaughlin et al 1995;Bauer et al 1997;Müller et al 2000;Hibbett and Thorn 2001;Van Driel et al 2009) as well as physiological and biochemical characteristics (Bartnicki-Garcia 1968;Van der Walt and Yarrow 1984;Prillinger et al 1993;Kurtzman and Fell 1998;Boekhout and Guého 2002) have significantly contributed to the systematics of basidiomycetes until the present day. The structural and biochemical database for fungi (Celio et al 2006) aims to capture several of these characters in a comprehensive manner.…”

Section: The Earlier Thirty Years: Taxonomic and Systematic Researchesmentioning

confidence: 99%

Molecular techniques revolutionize knowledge of basidiomycete evolution

Yang

2011

Fungal Diversity

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A brief survey towards an understanding of evolution of Basidiomycota in the last five decades is given. Between 1960-1990 studies were based mainly on morphology, subcellular structure, biochemistry, physiology and ecology. In the last 20 years, molecular methods have revolutionized the study of taxonomy, systematics, phylogeny, biogeography, population and microevolutionary processes in basidiomycetes. A fundamental improvement in the understanding of evolution of basidiomycetes has been achieved. It is anticipated that numerous new taxa at different taxonomic levels will be recognized based on integrated approaches, and new data will soon provide fascinating insights into the origin, evolution and biogeography of basidiomycetes in the coming years.

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The taxonomic position of Asterodon, Asterostroma and Coltricia inferred from the septal pore cap ultrastructure

Cited by 17 publications

References 17 publications

Septal pore apparatus and nuclear division of Auriscalpium vulgare

Septal pore apparatus and nuclear division of Auriscalpium vulgare

Septal Pore Cap Protein SPC18, Isolated from the Basidiomycetous Fungus Rhizoctonia solani , Also Resides in Pore Plugs

Molecular techniques revolutionize knowledge of basidiomycete evolution

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